#define _CRT_SECURE_NO_WARNINGS 
#include <stdio.h>
#include <assert.h>
char* my_strcpy(char* a, const char* b)
{
	char* m = a;
	assert(b);
	while (*a++ = *b++)
	{
		;
	}
	return m;
}
int main()
{
	char arr1[] = "bit is yyds!";
	char arr2[20];
	printf("%s", my_strcpy(arr2, arr1));
	return 0;
}